1-Azaxanthone-3-carboxylic acids, their preparation and pharmaceutical compositions containing them
Novel 1-azaxanthone-3-carboxylic acid derivatives, which are shown by the following formula (I) wherein R is hydrogen, alkyl, alkoxy or halogen; R1 and R2 are the same or different and each is hydrogen, alkyl or alkenyl; and m is 1 or 2; and their physiologically acceptable salts, are usable as effe...
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Main Authors | , , |
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Format | Patent |
Language | English French German |
Published |
08.04.1981
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Subjects | |
Online Access | Get full text |
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Summary: | Novel 1-azaxanthone-3-carboxylic acid derivatives, which are shown by the following formula (I) wherein R is hydrogen, alkyl, alkoxy or halogen; R1 and R2 are the same or different and each is hydrogen, alkyl or alkenyl; and m is 1 or 2; and their physiologically acceptable salts, are usable as effective medicines for preventing and/or treating allergic diseases. The compound of the formula (I) can be produced by reacting a compound of the formula: wherein R and m have the same meaning as defined above; R3 is carboxyl or group which is convertible into carboxyl through hydrolysis; X is alkyl phosphate radical or halogen, with a compound of the formula: wherein R1 and R2 have the same meaning as defined above, or its salt, and conducting hydrolysis, if necessary. |
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Bibliography: | Application Number: EP19800303461 |